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Valorisation of plastic waste via metal-catalysed depolymerisation
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This review covers metal-catalysed depolymerisation approaches for recycling and upcycling waste plastics back into monomers or value-added chemicals, highlighting recent advances in catalyst design that improve selectivity and yield for common polymer types.
Metal-catalysed depolymerisation of plastics to reusable building blocks, including monomers, oligomers or added-value chemicals, is an attractive tool for the recycling and valorisation of these materials. The present manuscript shortly reviews the most significant contributions that appeared in the field within the period January 2010-January 2020 describing selective depolymerisation methods of plastics. Achievements are broken down according to the plastic material, namely polyolefins, polyesters, polycarbonates and polyamides. The focus is on recent advancements targeting sustainable and environmentally friendly processes. Biocatalytic or unselective processes, acid-base treatments as well as the production of fuels are not discussed, nor are the methods for the further upgrade of the depolymerisation products.
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